她的问题源于童年。

Her problems ___stem ___from childhood.

这种教育方法源于强烈的家庭价值观和宗教信仰。

This educational approach ___stems ___from strong family values and religious beliefs.

当前的危机源于政治和经济因素的综合作用。

The current crisis ___stems ___from a combination of political and economic factors.